B01D 33/725
Special treatment of the feed stream before contacting the filtering element
Official title: {Special treatment of the feed stream before contacting the filtering element, e.g. cutting (B01D35/24, B01D37/02, B01D37/03 take precedence)}
B01D33/725 (Special treatment of the feed stream before contacting the filtering element) appears on 11 US grants and 8 published applications in this corpus.
Search patents in B01D- Granted patents
- 11
- Published applications
- 8
- Assignees
- 8
- Inventors
- 23
- Latest grant
- 20 Dec 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 2 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
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Most cited
By later US patents
- Ring centrifuge apparatus for residual liquid waste removal from recyclable container material24US 5,227,057 A1993
- Conical screen separator20US 4,140,629 AMartco, Inc. · 1979
- Method and apparatus for thickening lime mud with a disc filter16US 5,900,158 AA. Ahlstrom Corporation · 1999
- Method for mobile plastic and oil separation8US 5,232,607 A1993
- Centrifugal thickener5US 4,302,332 ANishihara Environmental Sanitation Research Corporation Limited · 1981